ZRACE Chain Line Measurement Tool 3D Printing Bicycle Bike Chainline Tool Offset Measurement Tool

Note: This product is made of PAL material3D printing. PAL material is corn extract and is 100% environmentally friendlyand biodegradable, but it is afraid of water and light. Please avoid soaking inwater and long-term exposure to sunlight.Brand: ZRACEMaterial: PALProcess: 3D printingApplication: Measuring chain lineWeight: 8gThe word "chainline" refers tohow straight the chain runs between the front and rear sprockets. Ideally, bothsprockets should be in the same plane, so that there is no sideward motion orstress to the chain. This constitutes "perfect chainline".In the case of derailer geared bicycles,the chainline is not perfect in most gears. Chainline mismatch can cause thechain to rub against the side of an outer, larger chainring when engaged with asmaller one, and can cause problems with shifting, especially with the frontderailer. The worse the chainline, the worse the mechanical efficiency of thedrive train。Symptoms of poor chain line:Premature wear to chains, chainrings andcassettesGrinding, rough or noisy pedalling Dropped chainsChains that derail when you backpedalwhile in the largest cassette cogHow to adjust the chain line:After measuring the accurate data of the chain line, you can adjust it by adding or subtracting crankshaft axle spacers or replacing spiders with different offsets according to the situation of the crankset.Chainline measurement method:1x2x / 3x